A medium extinguisher cover is an extremely effective way to stop people messing about with fire extinguishers, especially in schools - as well as providing protection from oil, paint, grease, and rain. The velcro fastenings on the back allow it to fit over extinguishers that are hanging on a wall bracket. Plus, although this is designed to fit a 6kg or smaller, check the dimensions as many large extinguishers fit in - height 525mm x width 450mm.